#include "junix.h"
using namespace std;

int main(int argc, char **argv)
{
	char a[] = "hello,world\n";
	char b[20];

	memset(b,0,sizeof(b));
	strcpy(b,a);
	cout<<b;

	memset(b,0,sizeof(b));
	memmove(b,a,sizeof(a));
	cout<<b;

	bzero(b,sizeof(b));
	bcopy(a,b,sizeof(a));
	cout<<b;
}
